CN108899356B - OLED display substrate, manufacturing method thereof and display device - Google Patents
OLED display substrate, manufacturing method thereof and display device Download PDFInfo
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- CN108899356B CN108899356B CN201811024585.5A CN201811024585A CN108899356B CN 108899356 B CN108899356 B CN 108899356B CN 201811024585 A CN201811024585 A CN 201811024585A CN 108899356 B CN108899356 B CN 108899356B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
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- H10K50/82—Cathodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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- H—ELECTRICITY
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Abstract
The invention provides an OLED display substrate, a manufacturing method thereof and a display device, and belongs to the technical field of display. Wherein, OLED display substrates includes: the light-emitting unit comprises a light-transmitting anode, a light-reflecting cathode and an organic light-emitting layer positioned between the light-transmitting anode and the light-reflecting cathode; the OLED display substrate further includes: the light-transmitting spacer is covered by the light-reflecting cathode, and the thickness of the part, which does not cover the side surface of the spacer or covers the side surface of the spacer, of the light-reflecting cathode is smaller than that of the other part of the light-reflecting cathode. By the technical scheme of the invention, the optical compensation of the bottom-emitting OLED display substrate can be realized.
Description
Technical Field
The invention relates to the technical field of display, in particular to an OLED display substrate, a manufacturing method thereof and a display device.
Background
The existing large-sized OLED (organic electroluminescent diode) display substrate generally adopts a bottom light-emitting scheme, the OLED display substrate with a bottom light-emitting structure adopts a light-reflecting cathode and a light-transmitting anode, and light emitted by the organic light-emitting layer exits the OLED display substrate through the light-transmitting anode. The mode of optically compensating the OLED display substrate is to utilize a photoelectric detection device to detect the luminous intensity of the OLED display substrate in real time, and then compensate the luminous intensity of the OLED display substrate according to the detection, so that the display effect of the OLED display substrate can be optimized.
However, in the prior art, the photodetection device is usually designed on the side of the cathode opposite to the anode, because the large-sized OLED display substrate has a high requirement on the electrical conductivity of the cathode, the cathode generally adopts Al, and in the bottom-emission OLED display substrate, Al can completely reflect the light emitted by the organic light-emitting layer to the side of the light-transmitting anode, so that no light can reach the photodetection device, and thus optical compensation for the bottom-emission OLED display substrate cannot be realized.
Disclosure of Invention
The invention aims to provide an OLED display substrate, a manufacturing method thereof and a display device, which can realize optical compensation of a bottom-emitting OLED display substrate.
To solve the above technical problem, embodiments of the present invention provide the following technical solutions:
in one aspect, an OLED display substrate is provided, including:
the light-emitting unit comprises a light-transmitting anode, a light-reflecting cathode and an organic light-emitting layer positioned between the light-transmitting anode and the light-reflecting cathode; the OLED display substrate further includes:
the light-transmitting spacer, the reflecting cathode covers at least part of the spacer, and the thickness of the reflecting cathode not covering the side surface of the spacer or the part of the reflecting cathode covering the side surface of the spacer is smaller than that of the other part of the reflecting cathode.
Further, the spacers are located between the adjacent light emitting units.
Further, the longitudinal section of the spacer is trapezoidal.
Further, the area of the first end part of one side of the spacer, which is far away from the substrate base plate, is smaller than the area of the second end part of one side of the spacer, which is close to the substrate base plate.
Further, the OLED display further includes:
and the light-reflecting pattern is positioned on the substrate and is over against the spacer, and the light-reflecting pattern is positioned on one side of the light-transmitting anode, which is far away from the light-reflecting cathode.
The embodiment of the invention also provides a display device, which comprises the OLED display substrate, and a photoelectric detection device positioned on one side of the light-reflecting cathode, which is opposite to the light-transmitting anode, wherein the photoelectric detection device is used for receiving light rays emitted by the organic light-emitting layer, generating electric signals according to the light rays and transmitting the electric signals to a driving circuit of the display device.
The embodiment of the invention also provides a manufacturing method of the OLED display substrate, which comprises the following steps:
the light-emitting unit comprises a light-transmitting anode, a light-reflecting cathode and an organic light-emitting layer positioned between the light-transmitting anode and the light-reflecting cathode; before forming the light-reflecting cathode, the manufacturing method further comprises:
forming a light-transmitting spacer on the substrate base plate;
forming the light-reflecting cathode includes:
and forming a reflective cathode on the substrate with the spacer, wherein the thickness of the reflective cathode not covered on the side surface of the spacer or the part of the reflective cathode covering the side surface of the spacer is less than that of the other part of the reflective cathode.
Further, forming the spacer includes:
the spacers are formed between the adjacent light emitting cells.
Further, forming the spacer includes:
the shock insulator with the trapezoidal longitudinal section is formed.
Further, the manufacturing method further comprises the following steps:
and forming a light-reflecting pattern which is opposite to the spacer on the substrate, wherein the light-reflecting pattern is positioned on one side of the light-transmitting anode, which is far away from the light-reflecting cathode.
The embodiment of the invention has the following beneficial effects:
in the above scheme, before the reflective cathode is formed, the spacer is formed on the substrate, and then the reflective cathode is formed on the substrate on which the spacer is formed, so that the reflective cathode does not cover the side surface of the spacer or the part of the reflective cathode covering the side surface of the spacer is smaller than the thickness of the other part of the reflective cathode, the side surface of the spacer has a certain light transmittance, light emitted by the organic light emitting layer can pass through the side surface of the spacer to reach the side of the cathode back to the anode, and thus the photoelectric detection device positioned on the side of the cathode back to the anode can receive the light emitted by the organic light emitting layer, and further optical compensation of the bottom-emitting OLED display substrate can be realized.
Drawings
FIG. 1 is a schematic structural diagram of a conventional OLED display substrate;
FIG. 2 is a schematic diagram of an optical inspection of a conventional OLED display substrate;
FIG. 3 is a schematic structural diagram of an OLED display substrate according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an OLED display substrate according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an OLED display substrate according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of an OLED display substrate according to still another embodiment of the invention.
Reference numerals
1 first substrate base plate
2 color filter unit
3 second substrate base plate
4 anode
5 organic light emitting layer
6 cathode
7 encapsulation layer
8 photoelectric detection device
9 third substrate base plate
10 spacer
11 light-reflecting pattern
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the existing OLED display substrate with a bottom emission structure includes an anode 4, an organic light emitting layer 5, and a cathode 6 on a second substrate 3, and further includes an encapsulation layer 7 covering the anode 4, the organic light emitting layer 5, and the cathode 6, wherein the cathode 6 is made of a reflective metal, and the anode 4 is made of a transparent conductive material. As shown in fig. 1, light emitted from the organic light-emitting layer 5 is reflected by the reflective cathode and exits through the anode 4 side. The light-emitting side of the OLED display substrate is provided with a first substrate 1 and a color filter unit 2 positioned on the first substrate 1.
As shown in fig. 2, in the prior art, a third substrate 9 and a photodetection device 8 located on the third substrate 9 are usually designed on a side of a cathode 6 facing away from an anode 4, because a large-sized OLED display substrate has a high requirement on the electrical conductivity of the cathode 6, the cathode 6 generally adopts Al, and in the bottom-emitting OLED display substrate, Al can completely reflect light emitted by an organic light-emitting layer 5 to a side of a light-transmitting anode, so that no light can reach the photodetection device 8, and thus optical compensation for the bottom-emitting OLED display substrate cannot be achieved.
Embodiments of the present invention provide an OLED display substrate, a manufacturing method thereof, and a display device, which can implement optical compensation for a bottom-emitting OLED display substrate.
An embodiment of the present invention provides an OLED display substrate, including:
the light-emitting unit comprises a light-transmitting anode, a light-reflecting cathode and an organic light-emitting layer positioned between the light-transmitting anode and the light-reflecting cathode; the OLED display substrate further includes:
the light-transmitting spacer, the reflecting cathode covers at least part of the spacer, and the thickness of the reflecting cathode not covering the side surface of the spacer or the part of the reflecting cathode covering the side surface of the spacer is smaller than that of the other part of the reflecting cathode.
In this embodiment, the light-reflecting cathode covers the protruding spacer, so that the thickness of the side surface of the spacer not covered by the light-reflecting cathode or the thickness of the part of the side surface of the spacer covered by the light-reflecting cathode is smaller than the thickness of the other parts of the light-reflecting cathode, the side surface of the spacer has certain light transmittance, light emitted by the organic light-emitting layer can pass through the side surface of the spacer to reach the side of the cathode, which is back to the anode, so that the photoelectric detection device positioned on the side of the cathode, which is back to the anode, can receive the light emitted by the organic light-emitting layer, and further optical compensation of the bottom-emitting OLED display.
Since the light-reflecting cathode covers the spacer and the spacer is convex, the light-reflecting cathode on the spacer is likely to be broken at the edge of the end of the spacer, and if the spacer is disposed in the region where the light-emitting unit is located, the breakage of the cathode will affect the light emission of the light-emitting unit, and therefore, in order that the light emission of the light-emitting unit is not affected by the disposition of the spacer, it is preferable that the spacer be disposed between adjacent light-emitting units. This also enables as much light as possible to be emitted by the organic light-emitting layer through the side of the spacer to the side of the cathode facing away from the anode.
In a specific embodiment, the longitudinal section of the spacer may be trapezoidal, and certainly, the longitudinal section of the spacer is not limited to be trapezoidal, and may also be in other shapes, such as rectangle, semi-ellipse, and the like, as long as the spacer is convex and the portion of the reflective cathode covering the side surface of the spacer is as thin as possible.
In a specific embodiment, as shown in fig. 3, the display substrate of this embodiment includes an anode 4, an organic light emitting layer 5, and a cathode 6 on a second substrate 3, and further includes an encapsulation layer 7 covering the anode 4, the organic light emitting layer 5, and the cathode 6, wherein the cathode 6 is made of a reflective metal, and the anode 4 is made of a transparent conductive material. As shown in fig. 3, light emitted from the organic light-emitting layer 5 is reflected by the reflective cathode 6 and exits through the anode 4 side. The first substrate base plate 1 and the color filter unit 2 located on the first substrate base plate 1 are arranged on the light emitting side of the OLED display base plate, full-color display of the OLED display base plate can be achieved through the color filter unit 2, and the color filter unit 2 specifically comprises a red filter unit, a blue filter unit and a green filter unit.
As shown in fig. 3, a convex spacer 10 is designed on the OLED display substrate, and the side surface of the spacer 10 is not covered with the reflective cathode 6, so that light emitted by the organic light emitting layer 5 can pass through the side surface of the spacer 10 to reach the side of the cathode 6 opposite to the anode 4, and the photodetector 8 can receive the light emitted by the organic light emitting layer 5, thereby achieving optical compensation of the bottom-emitting OLED display substrate. The photodetection device 8 may be a photosensor, a photodiode, or a photosensitive thin film transistor.
In order to enable more light to enter the side of the spacer 10 and improve the accuracy of optical compensation, as shown in fig. 4, the OLED display substrate further includes a reflective pattern 11 facing the spacer 10, and the reflective pattern 11 may be made of metal, where the reflective pattern 11 faces the spacer 10, that is, an orthographic projection of the reflective pattern 11 on the second substrate 3 covers an orthographic projection of the spacer 10 on the second substrate 3. The light reflection patterns 11 may reflect light emitted from the organic light emitting layer 5 to the spacer 10 so that more light is received by the photo-detection device 8 through the side of the spacer 10.
The larger the area of the light reflection pattern 11 is, the more light is received by the photodetection device 8; however, the larger the area of the light reflecting pattern 11 is, the less light is emitted from the OLED display substrate, and therefore, the area of the light reflecting pattern 11 is also not suitable to be set too large, and preferably, the orthographic projection of the light reflecting pattern 11 on the second substrate 3 is overlapped with the orthographic projection of the spacer 10 on the second substrate 3.
As shown in fig. 5, since the cathode 6 is present on the end of the spacer 10 away from the second substrate 3, a part of the light incident on the spacer 10 is reflected to reduce the light received by the photodetection device 8, and therefore, the cathode 6 on the end of the spacer 10 should be reduced as much as possible, so that more light can pass through the side of the spacer 10 to be received by the photodetection device 8. As shown in fig. 6, the spacer 10 may be designed such that the area of a first end portion of the spacer 10 on the side away from the second substrate board 3 is smaller than the area of a second end portion of the spacer 10 on the side close to the second substrate board 3, which makes it possible to make the cathode 6 on the end portion of the spacer 10 as small as possible.
As shown in fig. 6, the longitudinal section of the spacer 10 may be trapezoidal, but the longitudinal section of the spacer 10 may also be designed to be semi-elliptical, so as to reduce the number of cathodes 6 on the spacer 10 as much as possible. In addition, when the cathode 6 is formed by vapor deposition, the cathode 6 may be controlled not to be formed on the spacer 10.
The embodiment of the invention also provides a display device, which comprises the OLED display substrate, and further comprises a photoelectric detection device positioned on one side of the reflective cathode, which is opposite to the light-transmitting anode, wherein the photoelectric detection device is used for receiving light emitted by the organic light-emitting layer, generating an electric signal according to the light and transmitting the electric signal to a driving circuit of the display device, and the driving circuit of the display device can control the electric signal applied to the light-transmitting anode and/or the reflective cathode according to the received electric signal so as to realize optical compensation.
The display device may be: the display device comprises a television, a display, a digital photo frame, a mobile phone, a tablet personal computer and any other product or component with a display function, wherein the display device further comprises a flexible circuit board, a printed circuit board and a back plate.
In this embodiment, the light-reflecting cathode covers the protruding spacer, so that the thickness of the side surface of the spacer not covered by the light-reflecting cathode or the thickness of the part of the side surface of the spacer covered by the light-reflecting cathode is smaller than the thickness of the other parts of the light-reflecting cathode, the side surface of the spacer has certain light transmittance, light emitted by the organic light-emitting layer can pass through the side surface of the spacer to reach the side of the cathode, which is back to the anode, so that the photoelectric detection device positioned on the side of the cathode, which is back to the anode, can receive the light emitted by the organic light-emitting layer, and further optical compensation of the bottom-emitting OLED display.
The embodiment of the invention also provides a manufacturing method of the OLED display substrate, which comprises the following steps:
the light-emitting unit comprises a light-transmitting anode, a light-reflecting cathode and an organic light-emitting layer positioned between the light-transmitting anode and the light-reflecting cathode; before forming the light-reflecting cathode, the manufacturing method further comprises:
forming a light-transmitting spacer on the substrate base plate;
forming the light-reflecting cathode includes:
and forming a reflective cathode on the substrate with the spacer, wherein the thickness of the reflective cathode not covered on the side surface of the spacer or the part of the reflective cathode covering the side surface of the spacer is less than that of the other part of the reflective cathode.
In this embodiment, before the reflective cathode is formed, the spacer is formed on the substrate, and then the reflective cathode is formed on the substrate on which the spacer is formed, so that the reflective cathode does not cover the side surface of the spacer or the thickness of the portion of the reflective cathode covering the side surface of the spacer is smaller than the thickness of the other portion of the reflective cathode, the side surface of the spacer has a certain light transmittance, and light emitted by the organic light emitting layer can pass through the side surface of the spacer to reach the side of the cathode facing away from the anode, so that the photodetection device located at the side of the cathode facing away from the anode can receive the light emitted by the organic light emitting layer, and further optical compensation for the bottom-emitting OLED display substrate can be achieved.
Further, forming the spacer includes:
the spacers are formed between the adjacent light emitting cells.
Since the light-reflecting cathode covers the spacer and the spacer is convex, the light-reflecting cathode on the spacer is likely to be broken at the edge of the end of the spacer, and if the spacer is disposed in the region where the light-emitting unit is located, the breakage of the cathode will affect the light emission of the light-emitting unit, and therefore, in order that the light emission of the light-emitting unit is not affected by the disposition of the spacer, it is preferable that the spacer be disposed between adjacent light-emitting units. This also enables as much light as possible to be emitted by the organic light-emitting layer through the side of the spacer to the side of the cathode facing away from the anode.
Further, forming the spacer includes:
the shock insulator with the trapezoidal longitudinal section is formed.
In a specific embodiment, the longitudinal section of the spacer may be trapezoidal, and certainly, the longitudinal section of the spacer is not limited to be trapezoidal, and may also be in other shapes, such as rectangle, semi-ellipse, and the like, as long as the spacer is convex and the portion of the reflective cathode covering the side surface of the spacer is as thin as possible.
In a specific embodiment, as shown in fig. 3, the display substrate of this embodiment includes an anode 4, an organic light emitting layer 5, and a cathode 6 on a second substrate 3, and further includes an encapsulation layer 7 covering the anode 4, the organic light emitting layer 5, and the cathode 6, wherein the cathode 6 is made of a reflective metal, and the anode 4 is made of a transparent conductive material. As shown in fig. 3, light emitted from the organic light-emitting layer 5 is reflected by the reflective cathode 6 and exits through the anode 4 side. The first substrate base plate 1 and the color filter unit 2 located on the first substrate base plate 1 are arranged on the light emitting side of the OLED display base plate, full-color display of the OLED display base plate can be achieved through the color filter unit 2, and the color filter unit 2 specifically comprises a red filter unit, a blue filter unit and a green filter unit.
As shown in fig. 3, a convex spacer 10 is designed on the OLED display substrate, and the side surface of the spacer 10 is not covered with the reflective cathode 6, so that light emitted by the organic light emitting layer 5 can pass through the side surface of the spacer 10 to reach the side of the cathode 6 opposite to the anode 4, and the photodetector 8 can receive the light emitted by the organic light emitting layer 5, thereby achieving optical compensation of the bottom-emitting OLED display substrate. The photodetection device 8 may be a photosensor, a photodiode, or a photosensitive thin film transistor.
In order to enable more light rays to enter the side surface of the spacer and improve the precision of optical compensation, the manufacturing method further comprises the following steps:
and forming a light-reflecting pattern which is opposite to the spacer on the substrate, wherein the light-reflecting pattern is positioned on one side of the light-transmitting anode, which is far away from the light-reflecting cathode.
As shown in fig. 4, the OLED display substrate further includes a light-reflecting pattern 11 facing the spacer 10, and the light-reflecting pattern 11 may be made of metal, where the light-reflecting pattern 11 faces the spacer 10, that is, an orthographic projection of the light-reflecting pattern 11 on the second substrate 3 covers an orthographic projection of the spacer 10 on the second substrate 3. The light reflection patterns 11 may reflect light emitted from the organic light emitting layer 5 to the spacer 10 so that more light is received by the photo-detection device 8 through the side of the spacer 10.
The larger the area of the light reflection pattern 11 is, the more light is received by the photodetection device 8; however, the larger the area of the light reflecting pattern 11 is, the less light is emitted from the OLED display substrate, and therefore, the area of the light reflecting pattern 11 is also not suitable to be set too large, and preferably, the orthographic projection of the light reflecting pattern 11 on the second substrate 3 is overlapped with the orthographic projection of the spacer 10 on the second substrate 3.
As shown in fig. 5, since the cathode 6 is present on the end of the spacer 10 away from the second substrate 3, a part of the light incident on the spacer 10 is reflected to reduce the light received by the photodetection device 8, and therefore, the cathode 6 on the end of the spacer 10 should be reduced as much as possible, so that more light can pass through the side of the spacer 10 to be received by the photodetection device 8. As shown in fig. 6, the spacer 10 may be designed such that the area of a first end portion of the spacer 10 on the side away from the second substrate board 3 is smaller than the area of a second end portion of the spacer 10 on the side close to the second substrate board 3, which makes it possible to make the cathode 6 on the end portion of the spacer 10 as small as possible.
As shown in fig. 6, the longitudinal section of the spacer 10 may be trapezoidal, but the longitudinal section of the spacer 10 may also be designed to be semi-elliptical, so as to reduce the number of cathodes 6 on the spacer 10 as much as possible. In addition, when the cathode 6 is formed by vapor deposition, the cathode 6 may be controlled not to be formed on the spacer 10.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. An OLED display substrate, comprising:
the light-emitting unit comprises a light-transmitting anode, a light-reflecting cathode and an organic light-emitting layer positioned between the light-transmitting anode and the light-reflecting cathode; characterized in that, OLED display substrate still includes:
the light-transmitting spacer, the light-reflecting cathode covers at least part of the spacer, and the thickness of the part of the light-reflecting cathode, which does not cover the side surface of the spacer or covers the side surface of the spacer, is less than that of the other part of the light-reflecting cathode;
and the light-reflecting pattern is positioned on the substrate and is over against the spacer, and the light-reflecting pattern is positioned on one side of the light-transmitting anode, which is far away from the light-reflecting cathode.
2. The OLED display substrate of claim 1, wherein the spacers are located between adjacent light emitting cells.
3. The OLED display substrate of claim 1, wherein the spacers are trapezoidal in longitudinal cross-section.
4. The OLED display substrate plate of claim 3, wherein a first end of the spacer on a side away from the substrate base plate has an area smaller than a second end of the spacer on a side close to the substrate base plate.
5. A display device comprising the OLED display substrate as claimed in any one of claims 1 to 4, further comprising a photo-detection device disposed on a side of the reflective cathode facing away from the light-transmissive anode, the photo-detection device being configured to receive light emitted from the organic light-emitting layer and generate an electrical signal according to the light, and transmit the electrical signal to a driving circuit of the display device.
6. A manufacturing method of an OLED display substrate comprises the following steps:
the light-emitting unit comprises a light-transmitting anode, a light-reflecting cathode and an organic light-emitting layer positioned between the light-transmitting anode and the light-reflecting cathode; before the light-reflecting cathode is formed, the manufacturing method further comprises the following steps:
forming a light-transmitting spacer on the substrate base plate;
forming a light-reflecting pattern facing the spacer on the substrate, wherein the light-reflecting pattern is positioned on one side of the light-transmitting anode away from the light-reflecting cathode;
forming the light-reflecting cathode includes:
and forming a reflective cathode on the substrate with the spacer, wherein the thickness of the reflective cathode not covered on the side surface of the spacer or the part of the reflective cathode covering the side surface of the spacer is less than that of the other part of the reflective cathode.
7. The method of claim 6, wherein forming the spacers comprises:
the spacers are formed between the adjacent light emitting cells.
8. The method of claim 6, wherein forming the spacers comprises:
the shock insulator with the trapezoidal longitudinal section is formed.
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| US11348978B2 (en) | 2018-12-19 | 2022-05-31 | Boe Technology Group Co., Ltd. | Display panel and method for manufacturing the same, and display device |
| CN111261053B (en) * | 2020-01-20 | 2023-10-13 | 京东方科技集团股份有限公司 | Micro light-emitting diode display panel, manufacturing method thereof and display device |
| CN114284319B (en) * | 2021-12-14 | 2023-09-26 | 武汉华星光电半导体显示技术有限公司 | Display panel and electronic equipment |
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| CN1934709A (en) * | 2004-03-24 | 2007-03-21 | 皇家飞利浦电子股份有限公司 | Electroluminescent display devices |
| CN101226992A (en) * | 2006-12-28 | 2008-07-23 | 财团法人山形县产业技术振兴机构 | Organic el light-emitting apparatus and method of manufacturing the same |
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| CN108899356A (en) | 2018-11-27 |
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